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    Cobalt Jobbers

    Cobalt Jobbers - Fractional Sizes

    a representational image of the JL-COBALT class
    Cobalt Jobbers contain a percentage of Cobalt in their steel, greatly increasing their wear resistance.
    shank size is the same as the diameter of the drill

    Cobalt Jobbers - Letter Sizes

    a representational image of the JL-COBALT class
    Cobalt Jobbers contain a percentage of Cobalt in their steel, greatly increasing their wear resistance.
    shank size is the same as the diameter of the drill

    Cobalt Jobbers - Number / Wire Sizes

    a representational image of the JL-COBALT class
    Cobalt Jobbers contain a percentage of Cobalt in their steel, greatly increasing their wear resistance.
    shank size is the same as the diameter of the drill
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